<!DOCTYPE html>
<html>
<head>
	<title></title>
</head>
<style type="">
	div{
		width:0px;
		height:0px;
		/*background-color: black;*/
		border-top:250px solid red;
		border-right:250px solid yellow;
/*		border-bottom:10px solid blue;
		border-left:10px solid skyblue;*/
	}
</style>
<body>
	<div>
		
	</div>
</body>
</html>